PHENIX on-line systems

S. S. Adler, M. Allen, G. Alley, R. Amirikas, Y. Arai, T. C. Awes, K. N. Barish, F. Barta, S. Batsouli, S. Belikov, M. J. Bennett, M. Bobrek, J. G. Boissevain, S. Boose, C. Britton, L. Britton, W. L. Bryan, M. M. Cafferty, T. A. Carey, W. C. ChangC. Y. Chi, M. Chiu, V. Cianciolo, B. A. Cole, P. Constantin, K. C. Cook, H. Cunitz, E. J. Desmond, K. Ebisu, Y. V. Efremenko, K. El Chenawi, M. S. Emery, D. Engo, N. Ericson, D. E. Fields, S. Frank, J. E. Frantz, A. Franz, A. D. Frawley, J. Fried, J. Gannon, T. F. Gee, R. Gentry, P. Giannotti, H. A. Gustafsson, J. S. Haggerty, S. Hahn, J. Halliwell, H. Hamagaki, A. G. Hansen, H. Hara, J. Harder, X. He, F. Heistermann, T. K. Hemmick, M. Hibino, J. C. Hill, K. Homma, B. V. Jacak, U. Jagadish, J. Jia, F. Kajihara, S. Kametani, Y. Kamyshkov, A. Kandasamy, J. H. Kang, J. Kapustinsky, K. Katou, M. A. Kelley, S. Kelly, J. Kikuchi, S. Y. Kim, Y. G. Kim, E. Kistenev, D. Kotchetkov, K. Kurita, J. G. Lajoie, M. Lenz, W. Lenz, X. H. Li, S. Lin, M. X. Liu, S. Markacs, F. Matathias, T. Matsumoto, J. Mead, R. E. Mischke, G. C. Mishra, A. Moore, M. Muniruzzamann, M. Musrock, J. L. Nagle, B. K. Nandi, J. Newby, J. Nystrand, E. O'Brien, P. O'Connor, H. Ohnishi, A. Oskarsson

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Abstract

The PHENIX On-Line system takes signals from the Front End Modules (FEM) on each detector subsystem for the purpose of generating events for physics analysis. Processing of event data begins when the Data Collection Modules (DCM) receive data via fiber-optic links from the FEMs. The DCMs format and zero suppress the data and generate data packets. These packets go to the Event Builders (EvB) that assemble the events in final form. The Level-1 trigger (LVL1) generates a decision for each beam crossing and eliminates uninteresting events. The FEMs carry out all detector processing of the data so that it is delivered to the DCMs using a standard format. The FEMs also provide buffering for LVL1 trigger processing and DCM data collection. This is carried out using an architecture that is pipelined and deadtimeless. All of this is controlled by the Master Timing System (MTS) that distributes the RHIC clocks. A Level-2 trigger (LVL2) gives additional discrimination. A description of the components and operation of the PHENIX On-Line system is given and the solution to a number of electronic infrastructure problems are discussed.

Original languageEnglish
Pages (from-to)560-592
Number of pages33
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume499
Issue number2-3
DOIs
Publication statusPublished - 2003 Mar 1

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Adler, S. S., Allen, M., Alley, G., Amirikas, R., Arai, Y., Awes, T. C., Barish, K. N., Barta, F., Batsouli, S., Belikov, S., Bennett, M. J., Bobrek, M., Boissevain, J. G., Boose, S., Britton, C., Britton, L., Bryan, W. L., Cafferty, M. M., Carey, T. A., ... Oskarsson, A. (2003). PHENIX on-line systems. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 499(2-3), 560-592. https://doi.org/10.1016/S0168-9002(02)01957-5